first do a water test for pH and ammonia if the ammonia is high like over 0 ppm like 2ppm do a 25% change if the ammonia is high and add a water treatment like stress coat to lower the ammonia
now the pH the pH need to be 7 to 8 if its not in that range you add some drops that you would find in your test kit to raise the pH then test water to see if the pH is ok
You should not have goldfish and platies in the same tank ever.
It is important to remember to put things in a goldfish tank, even goldfish get bored. Some of my suggestions for tank decor are artificial plants and a "hidey hole" for your goldfish.
Leaving a dead goldfish in your tank will boost ammonia levels.. You dont want ammonia in your tank. It rapidly kills fish
no. you should have 10gal of water per goldfish. you shouldn't have goldfish in a 5gal tank at all. they are huge waste producers
NO
an aquarium or a fish tank
Once a week :))))) i have experience
It may be just sleeping. Try cleaning up it's cage. Ormaybe it is'nt well.
It's a possibility, but a goldfish and a platy should never be in the same tank as they are not compatible, and their needs are different
almost any other type of fish just make sure their bigger than the gold fishes mouth or the goldfish will eat it
Yes
No, first of all they should not be in the same tank, and secondly, goldfish are egg laying fish so they do not get pregnant